28382657 has 4 divisors (see below), whose sum is σ = 28409856. Its totient is φ = 28355460.

The previous prime is 28382647. The next prime is 28382671. The reversal of 28382657 is 75628382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75628382 = 2 ⋅37814191.

It is a cyclic number.

It is not a de Polignac number, because 28382657 - 2⁶ = 28382593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28382647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11969 + ... + 14142.

It is an arithmetic number, because the mean of its divisors is an integer number (7102464).

Almost surely, 2^28382657 is an apocalyptic number.

It is an amenable number.

28382657 is a deficient number, since it is larger than the sum of its proper divisors (27199).

28382657 is a wasteful number, since it uses less digits than its factorization.

28382657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27198.

The product of its digits is 161280, while the sum is 41.

The square root of 28382657 is about 5327.5376113173. The cubic root of 28382657 is about 305.0359430901.

The spelling of 28382657 in words is "twenty-eight million, three hundred eighty-two thousand, six hundred fifty-seven".